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Table 2 The incomplete ordered information table with the first level of granulations

From: A data fusion method in wireless sensor network based on belief structure

U a11 a21 a31 a41
\(x_1\) 90 90 \(*\) 90
\(x_2\) 70 90 70 90
\(x_3\) \(*\) 30 10 30
\(x_4\) 50 50 \(*\) 50
\(x_5\) 30 50 30 30
\(x_6\) 70 70 70 70
\(x_7\) 10 30 10 30
\(x_8\) \(*\) 90 90 90
\(x_9\) 30 50 50 50
\(x_{10}\) 90 \(*\) 90 90
\(x_{11}\) 50 70 50 70
\(x_{12}\) 10 10 10 \(*\)